Where an informant providing information is “effectively anonymous” such that their personal credibility cannot be judged and the original source of information cannot be ascertained, it is insufficient to support reasonable suspicion and justify a Terry stop.The 1st District Appellate Court reversed the decision of Cook County Associate Judge Timothy Joseph Joyce.A Chicago police officer called for assistance during a 1,200-person annual evening picnic in Brainerd Park on the city’s South Side. Two …